Hydraulic orifice

Abstract

A hydraulic orifice which is mounted at a head oil journal formed in a cylinder head and supplies an oil to a supply line after reducing pulsation of the oil supplied to the head oil journal, may include a body pressed on the head oil journal so as to form a chamber with the cylinder head, a joining line formed along a longitudinal axis of the body therein and fluid-communicating with the supply line, and at least two hydraulic lines formed in the body and connecting the chamber with an end of the joining line in the body to supply the oil through the other end thereof to the supply line, wherein the oils passing through the at least two hydraulic lines are joined at the end of the joining line with different phases such that the pulsation of the oil in the joining line is reduced.

What is claimed is: 
     
       1. A hydraulic orifice which is mounted at a head oil journal formed in a cylinder head and supplies an oil to a supply line after reducing pulsation of the oil supplied to the head oil journal, the hydraulic orifice comprising:
 a body pressed on the head oil journal so as to form a chamber with the cylinder head; 
 a joining line formed along a longitudinal axis of the body therein and fluid-communicating with the supply line; and 
 at least two hydraulic lines formed in the body and connecting the chamber with an end of the joining line in the body to supply the oil through the other end thereof to the supply line, 
 wherein the oils passing through the at least two hydraulic lines are joined at the end of the joining line with different phases such that the pulsation of the oil in the joining line is reduced. 
 
     
     
       2. The hydraulic orifice of  claim 1 , wherein the at least two hydraulic lines have different lengths such that the oils passing through the at least two hydraulic lines are joined at the end of the joining line with the different phases. 
     
     
       3. The hydraulic orifice of  claim 1 , wherein the end of the joining line is wider than the other end thereof to form a conical shape. 
     
     
       4. The hydraulic orifice of  claim 1 , wherein the head oil journal abuts on the supply line, and a diameter of the head oil journal is larger than that of the supply line, and
 wherein an end of the body is pressed on the head oil journal and the other end of the body is pressed on the supply line such that the chamber is formed between the end of the body and the head oil journal. 
 
     
     
       5. The hydraulic orifice of  claim 1 , wherein the head oil journal abuts on the supply line, and a diameter of the head oil journal is larger than that of the supply line, and
 wherein a diameter of both ends of the body is larger than that of a middle portion of the body and the both ends of the body are pressed on the head oil journal such that the chamber is formed between the both ends of the body and the head oil journal. 
 
     
     
       6. A hydraulic orifice which is mounted at a head oil journal formed in a cylinder head and supplies an oil to a supply line after reducing pulsation of the oil supplied to the head oil journal, the hydraulic orifice comprising:
 a body; 
 first and second hydraulic lines formed in the body and receiving the oil from the head oil journal; and 
 a joining line formed along a longitudinal axis in the body, joining the first and second hydraulic lines at an end thereof, and supplying the oil supplied through the first and second hydraulic lines to the supply line through the other end thereof, 
 wherein a first oil flow passing through the first hydraulic line and a second oil flow passing through the second hydraulic line are joined at the end of the joining line with different phases. 
 
     
     
       7. The hydraulic orifice of  claim 6 , wherein a length of the first hydraulic line is different from that of the second hydraulic line such that the first oil flow and the second oil flow are joined at the end of the joining line with different phases. 
     
     
       8. The hydraulic orifice of  claim 7 , wherein a phase difference between the first oil flow and the second oil flow is approximately 180°. 
     
     
       9. The hydraulic orifice of  claim 6 , wherein the head oil journal abuts on the supply line, and a diameter of the head oil journal is larger than that of the supply line, and
 wherein an end of the body is pressed on the head oil journal and the other end of the body is pressed on the supply line such that a chamber is formed between the end of the body and the head oil journal. 
 
     
     
       10. The hydraulic orifice of  claim 6 , wherein the head oil journal abuts on the supply line, and a diameter of the head oil journal is larger than that of the supply line, and
 wherein a diameter of both ends of the body is larger than that of a middle portion of the body and the both ends of the body are pressed on the head oil journal such that a chamber is formed between the both ends of the body and the head oil journal. 
 
     
     
       11. The hydraulic orifice of  claim 6 , wherein the end of the joining line is wider than the other end thereof to form a conical shape.